Check out that hypnotic glow from the center of this image — it's the brightest central star in a planetary nebula that astronomers have seen so far. Why does the center of the Cat's Eye Nebula shine so intensely? »8/21/09 10:00am 8/21/09 10:00am

Is this art? This picture of the Cat's Eye Nebula, and other images from the Hubble Space Telescope, are hanging at the Walters Art Museum in Baltimore. The exhibition of science photos has made people question whether a photo taken by a machine can be art. But the more you examine that question, the more you realize… »2/15/08 10:00am 2/15/08 10:00am